scott



3 Sheets--Sheet 1 J. R. SCOTT. Machine for Sewing Boots and Shoes. No.233,559. 1 P nted Oct. 19,1880.

WITNESSES: INVENTOE ATTORNEYS.

N. PETERS, PKOTO-LITHOGRAPNER, WASHINGTON. D C.

- 3 Sheets-Sheet} 2.

J. R. SCOTT. Machine for Sewing Boots and Shoes. No. 233,559.

5 Pa tented Oct. 19,1880;

WITNESSES: INVB TOR: 5/ MK H W 7r [2 [yank/(7 N.PETER5.PHOTO-LITHOGRAPHER, WASHINGTON, D C

= TTORNEYS 3 Sheets-Sheet; 3.

J. R. SCOTT. Machine for Sewing Boots and Shoes. No. 233,559. PatentedOct. 19, I880.

VM- I WITNESSES: INVENTOR: zazajdf' 1 01% c L/; 6 I a. @W W ATTORNEYS.-

NITED STATES FFICE.

JACOB R. SCOTT, OF NYAOK, NE\V YORK, ASSIGNOR TO HIMSELF AND ANDREW H.JAOKMAN, OF SAMEPLAOE.

MACHINE FOR SEWING BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 233,559, dated October19, 1880.

Application filed December 19. 1879.

To all whom it may concern.-

Be it known that I, JACOB R. Scorn-of N yack, in the county of Rocklandand State of New York, have invented new and useful Improvements inMachines for Sewing Boots and Shoes, of which the following is aspecification.

My improvements relate to machines for sewing boots and shoes.

The object of my invention is to furnish a machine that will meet thepeculiar requirements of that class of work without complicatedmechanism; and the invention consists, specially, in the mechanism fortightening the stitch, whereby the layers of leather shall be tightlydrawn together, and also in the looping mechanism for forming thestitch, the construction and operation of which parts I willparticularly describe with reference to the accompanying drawings, whichshow my improvements in connection with such other parts of the machineas are necessary in understanding the operation.

In the drawings, Figure 1 is a side elevation of the machine. Fig. 2 isa front elevation, partially in section. Fig. 3 is a section verticallythrough the end of the horn, and showing the looping mechanism. Fig. 4is a top view of the looping device. Fig. 5 is a section showing therelative position of the needle and looper at the extreme downwardposition of the needle. Fig. 6 is a view of the same parts at rightangles to Fig. 5, showing the. needle raised. Fig. 7 is a plan view ofthe tension device for the thread-spool. Fig. Sis an inverted plan viewof the same. Fig. 9 is an opposite side elevation to that of Fig. 1,with the balance-wheel removed and the feet broken off.

Similar letters of reference indicate corresponding parts.

The horn A is sustained upon a bed, B, that is fitted to revolve, andwhich carries upon a vertical pin, a, the spool b for the thread. 0 isthe needle in bar (I, operated as hereinafter described, and e is thepresser-foot upon the lower end'of post f. The thread-loopin g mechanismis fitted in the end of the horn A, and will be next described.

In the end of horn A, which revolves freely in a horizontal direction,is fitted a tube, 9,

forming a socket-piece, in which the looper 7b is hung. The top of tube9 is covered by a plate that is apertured for the passage of the needle,and extends to a form on arm it, upon which the work will rest.

The looper h, as shown clearly in Figs. 3, 4. and 5, consists of a plateor block of metal with a projection, 71, extending at right angles andapertured for the passage of the thread, the two portions forming anangular block that is hung loosely in tube 9 by a cross-pin, 7c. Thelooper h is held while the needle is descending in the position shown inFigs. 3 and 4 by the tension of the previously-formed stitches, and isthrown down to the position shown in Fig. 5 by the needle, whereby thethread is thrown above the needle-hook, where it is held by theprojection t of the looper. At the upward movement of the needle itcarries the thread up to form a new loop, at the same time raising thelooper and drawing the thread from the spool.

As well understood in sewing boots and shoes, it is essential that theloops be drawn tightly, and as the thickness of material is.

constantly varying automaticallyacting devices have been used to varythe stroke of the needle, according to the thickness of the material. Mylooping devices may be used in connection with any such devices; but Iprefer the mechanism as hereinafter described.

Upon the pin a, carrying the spool b, is a three-armed plate, 5, that istitted with pads l, of leather or othersoft or elastic material, uponwhich pads the lower head of spool b rests. A nut, b, is fitted on theupper end of pin a, by which the spool may be pressed upon the pads I,so that the spool b and plate l will be connected by friction and willturn together.

To the plate 1 is connected one end of the spring m, that is attached byits other end to the horizontal portion of the horn A, from which pin arises. The springm is connected in such manner that it tends to turnplate Z, and with it the spool, in a direction to wind the thread, themovement of plate I in the other direction being checked by a pin, m.

It is to be noticed that the tension required for the thread is given bythe friction of the pads I, while the spring at will act to draw backany surplus length of thread in case more is drawn off than is requiredto form the loop. These parts should be adjusted so that as the needlerises and the spool turns to draw off the thread the first effect is todraw out the spring at until its tension is greater than the frictionbetween the pads l and the spool, or until the plate Z is stopped by thepin m, when the spool will slip until the needle has completed itsupward movement, and the spring m will then act to draw back the spool,and thus take up or tighten the thread. Thus it will be seen that, theneedle havingits stroke adjusted for the greatest thickness of material,any looseness of stitches by thinner materials or soft places in thematerial will be prevented, as every stitch will be drawn tightly.

I have shown mechanism for automatically varying the stroke of theneedle according to the variations in the thickness of material passingbetween the horn and presser-foot. This mechanism may be preferable insome kinds of work, especially fine work. For the reason that no rest isrequired at the completion of the downward stroke of the needle, I amenabled to use for this purpose much simpler devices than heretoforerequired.

The needle-bar is hung by means of a connecting-rod, e, on the end of alever, 71, that is rocked by an eccentric, 0, which lever is pivoted ona fulcrum-post, 19, that is fitted for vertical movement and carries thelevers q q, through which the presser post or bar f passes. The lever qis moved by a cam to raise the presser-bar after the feed is given, andlever g, by its cam, gives pressure on bar fthrough the spring'r, thatis around barf. These movements are as usual.

Above the bar, in suitable supports, is titted a rock-shaft, w, thatcarries a spring-arm, s, projecting in the path of the barf, and uponthe same shaft is fixed an arm, 13, that is connected by alink, .T, witha Wedge-shaped slide, a, fitted to move on the top plate of the machine,beneath an inclined projection, p, on fulcrum-postp. These parts form acrank-lever that is operated every time the presser-bar f rises to movethe slide a beneath the projection 19 and raise the post p bodily moreor less, such movement being varied necessarily by the thickness of thematerial beneath the presserfoot. The movement of post p upwardnecessarily raises the fulcrum of lever n, to which the needle-bar ishung, and increases the stroke of the needle. spring, a.

The slide it is withdrawn by a The socket-piece g and looper h aremaintained in the same relative position to the needle by the revolvinghorn A. In some instances it may be desirable to use a stationary horn;then the socket is made to revolve freely in said horn, in order thatthe looper may be held in the same relative position to the needle byits arm h, which conforms generally to the shape of the sole and willmove with the shoe.

The machine above described may be used for sewing boots and shoes withor Without a groove, and is especially adapted for sewing without agroove.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent 1. In a sewing-machine, the three-armed plate I,provided with pads l, the spring on, and the pin m, in combination withthe spool b, the horn A, and the looper h, pivoted in an aperture in theend'of the horn, substantially as and for the purpose set forth.

2. In a sewing-machine, a rocking looper constructed substantially asherein shown and described, and pivoted in an aperture in the end of thehorn, in combination with the needle and mechanism for reciprocating it,substantially as and for the purpose set forth.

3. The rocking looper h, having the projection '5, which is providedwith an aperture for the passage of the thread, in combination with thesocket g, the horn A, the needle 0, and mechanism for reciprocating it,substantially as and for the purpose set forth.

4. The socket g, provided with the arm h, and the looper h, pivotedwithin the said socket, in combination with the horn A, the needle 0,and mechanism for reciprocating it, substantially as and for the purposeset forth.

5. The combination of the fulcrum-postp, provided with inclinedprojection 10, the wedgeshaped slide a, and the spring a with the linkm, rock-shaft w, arms 8 t, lever n, needle-bar d, and presser-foot barf,substantially as and for the purpose set forth.

6. The combination of the presser-foot bar f, spring 1", levers q q,arms 8 t, rock-shaft w, link 00, wedge-shaped slide u, and spring a withthe fulcrum-post 19, provided with the inclined projection 19, lever n,and the needle-bar d, substantially as and for the purpose set forth.

JACOB R. SCOTT. Witnesses:

Gno. D. WALKER, O. SEDGWIGK.

